It's going to be a very merry Christmas for Britney Spears! The pop princess is engaged to her former manager Jason Trawick, whom she's been dating since 2009. The singer hinted at the news via Twitter on Dec. 16, posting: "OMG. Last night Jason surprised me with the one gift I've been waiting for. Can't wait to show you! SO SO SO excited!!!!" A source later confirmed to Us Weekly that the Trawick had popped the question. This will be the third trip down the aisle for Spears, who was previously married to Kevin Federline and Jason Alexander.